In Swift Convert [String: Any!] to URLComponents

Question

I'm having a dictionary [String: Any!] that has values like integers, floats and strings. When I'm creating URLComponents using below code, its not taking values related to integers and floats.

 func queryItems(dictionary: [String: Any]) -> [URLQueryItem] {
    return dictionary.map {
        URLQueryItem(name: $0, value: $1 as? String)
    }
}

Answer 1

Obviously Any could be anything. But if you have some control of your inputs one easy option is casting to LosslessStringConvertible. String, Substring and your basic numeric types all conform to it.

Warnings:

• Bool returns true or false.
• NSObject does not conform to this, so if you're mixing in NSNumber or NSString you need to account for those also.

func queryItems(dictionary: [String: Any]) -> [URLQueryItem] {
    dictionary.map {
        URLQueryItem(name: $0, value: ($1 as? LosslessStringConvertible)?.description)
    }
}

Answer 2

I think you should consider using [String:String] instead of [String:Any] and convert your values to String one step before sending it to queryItems function.But if you want to leave it like this than casting from value Int,Float,Double with as? String always fails. you can use String().